“Analytical Study of Mathematics Textbooks in the Basic Education Stage in the Sultanate of Oman According to NCTM Standards”, jperc, vol. 17, no. 67, pp. 268–293, Mar. 2022, Accessed: May 06, 2025. [Online]. Available: https://jperc.uobaghdad.edu.iq/index.php/jperc/article/view/1106